Ellsworth a



IE. A. HAWTHORNE.

LAMP.

APPLICATION FILED IuLY7. 191s. IIENEwED IIAII. 9. 1918.

Patented June 1, 1920.

inw... v

UNITEDl STATES PATENT OFFICE.A

ELLSWORTH A. HAWTHORNE, F BRIDGEPORT, CONNECTICUT.`

f LAMP.

Application led J'uly 7, 1916, Serial No. 108,062. Renewed March 9,1918.

7 1o all whom 'it may concern.'

Be it known that I, ELLswon'rH A. HAWTHORNE, a citizen of the UnitedStates, and a resident of Bridgeport, in the county of Fairfield andState of Connecticut, have invented an Improvement in Lamps, of whichthe following description, in connection with the accompanyingldrawings, is a specification, like characters on the drawingsrepresenting like parts.

his invention relates to lamps, and more particularly to lamps such asare used on vehicles, and one of the purposes thereof is to provide sucha lamp which can be readily brought to proper focus.

My invention will be best understood by reference to the followingdescription,taken in connection with the accompanying drawings, wherein:

Figure 1 is a central vertical section through a form of lamp which willserve as an illustrative embodiment of my invention;

Fig. 2 is a central horizontal sectionl through part of the lamp shownin Fig. 1;

Fig. 3 is a section on line 3-3 of Fig.- 2, but on a larger scale;

Fig. 4 is a view similar to Fig. 3, showing the parts in a differentposition of adjust ment;

Fig. 5 is a plan view of one of the parts arranged in a position similarto that it occupies in Figs. 3 and 4;

Fig. 6 is a section on line 6-6 of Fig. 1, but on a larger scale; and YFig. 7 is a central horizontal section showing certain parts of thelamp.

The form of lamp which I have chosen, as illustrated in my invention,includes a suitable casing with an interior reflecting surface, and Ihave here shown an exterior casing l and a separate reflector 3 withinthe same, which may be and preferably is of parabolic form. The front ofthis casrving may be closed by a suitable bezel 5 and glazing 7, hereshown as of the ykind disclosed in my Patent No. 1,203,618,`dated Nov.7, 1916. I have illustrated the lamp as carrying a main light 9,disposed eentrally therein, and a smallv pilot light 11 disposed at oneside thereof. The main light 9 is mounted in a light-carrying member 13,which may be provided, as shown, with suitable bayonet slots 15 toreceive pins 17 carried by the light.

The light-carrying member 13, as shown,

Specification of Letters Patent.

Patented June 1, 192(k).

Serial No. 221,575.

extends through the reflector,'whieh may be and preferably is providedwith a ferrule or sleeve 19 to furnish an extended bearing for saidmember, and also through the casing to the outside thereof. Part of thecasing forms a housing to receive the member 13, and in the presentembodiment, a part of this housing is extended rearwardly from the mainpart of the casing, and may serve as a handle 21 by which the lamp maybe moved. The member 13 is shown as extending through a suitableaperture in the 'rear of the housing, and may be provided exteriorlywith a switch handle or finger grip 23, it being understood thatsuitable switch means are carried by the member 1.3 for controlling thelight or lights in the casing.

To adjust the light 9 to proper focus, the light-carrying member may beshifted in its bearings in the reflector 3, and housing 21. To permitsuch adjustment without occasioning rotary movement ofthe member whichwould impose a strain on the connecting wires, the member 13 is lockedagainst rotation. In the present embodiment of the invention, there aretwo devices which tend to keep the member' 13 from rotating, one ofwhich will' now be described. Preferably I provide for interlocking themember 13 with ythe housing 21,

for example by providing the embossed riby 25 on the member which fits arecess 27 in the wall of the housing, thus forming a tongue and slotconnection. Otherwise described, it might be said that the housing 21 isprovided with a non-circular aperture in which the light-carrying member13 fits.

Prior to my present invention, it had been proposed to hold asimilarlight-carrying member by forming a joint between thc same and thereflector, but to do this' necessitated cutting slots other than theslots 15 in the inward end of the' member. Thus it was considerablyweakened, and a further disadvantage arose in that users would attemptto engage the lamp 9 with the guidy ing slotsrather than with thebayonet slots similar to 15. In the present instance, the inward endofthe member is slotted only to receive the pins 17 on the light 9, andtherevantage of forming the packing 39 with the cup-shaped portion 43.As the member 13 is moved rearwardly in adjusting the focus of the lamp9, the small liber washer 55 will engage with the cork packing 39. If byVchance there should be any loose strands of wire in the cable 51, or ifthe latter should become disconnected from the binding screw 13, thepacking 39 will avoid a short circuit as it will prevent the cable fromtouching the side of the lamp body. r1`he cup-shaped depression 43receives, as it were, the connection of the wire 51 and, extending overthe same, thoroughly guards all adjacent parts of the lamp casing fromsuch stray ends of wire as have been mentioned.

The large washer or plate 57 also has an insulating function. As seenfrom Figs. 1 and 7, it projects well forward of the points of connectionof the wires, and therefore in the forward movement of the member 13, itwill come in contact with the reflector 3 or the sleeve 19 extendingtherefrom, and prevent any loose strands of wire short-circuiting on thereflector. Furthermore, quite independently of its function as aninsulator to prevent short-circuiting, this washer will act as a stopwhich, by engaging with the sleeve 19 of the reflector', will check theforward movement of the light-carrying member 13, and thus keep the samefrom dropping into the interior ofthe housing 21. 1n Fig. 7, the washer57 is clearly shown in contact with the sleeve 19 of the reflector, andit is apparent that the member 13 cannot move any farther toward theright. I have described in detail the embodiment of my invention hereillustrated, and in so doing, have referred to the various parts byspecific words. It will be understood, however, that I have donethis inorder that the structure shown might be more readily understood and notwith a defining purpose, as the various details disclosed are not of theessence.

What I do claim and desire to secure by Letters Patent is:

1. A lamp embodying a casing having an interior reflecting surface, alight-carrying member slidably mounted and extending through saidcasing, and an adjustable jaw coperating with said casing to clamp saidmember against sliding movement, said aw having a lug and slotconnection with said member. y

2. A lamp embodying a casing having an interior reflecting surface, ahousing extending rearwardly from said casing, a light-carrying memberextending through said housing, and an element interposed between saidmember and a wall of the housing and movable from the exterior of thehousing to exert a wedging force tending to spread apart saidlight-carrying member and the housing, said element being held againstrotary movement with respect both to said member and said housing.

3. A lamp embodying an exterior casing and an interior reflectordefining a space between them and a housing extending rearwardly fromsaid casing, a light-carrying member extending through said reflectorand housing and having sliding bearing therein, means coperating withsaid housing for holding said member against rotative movement, apacking member at the junction of said housing and casing providing abearing for said light-carrying member and substantially isolating theinterior of said housing from the space aforesaid,

and clamping means to hold said light-carrying member in selectedpositions of longitudinal adjustment.

4. A lamp embodying an exterior casing and an interior reflectordefining a space between them and a housing extending rearwardly Vfromsaid casing, a light-carrying member extending though said reflector andhousing and having sliding bearing therein, means coperating with saidhousing for holding said member against rotative movement, electricconnections to said member disposed in said space, an insulatingpartition at the junction of said housing and casing providing a bearingfor said member and substantially isolating the interior of said housingfrom the space aforesaid, and clamping means to hold said light-carryingmember in selected positions of longitudinal adjustment.

5. A lamp embodying an exterior casing and an interior reflectordefining a space between them and a housing extending rearwardly fromsaid casing, a light-'carrying member extending through said reflectorand housing and having sliding bearing therein, means coperating withsaid housing for holding said member against rotative movement, electricconnections to said member rdisposed in said space, an insulatingpartition at the junction of said housing and casing providing a bearingfor said member and substantially isolating the interior of said housingfrom the space aforesaid, said partition providing a cup-shapeddepression surrounding said member and facing toward seid space, anddemping Ineens to hold seid light-carrying member in selected positionsof longitudinal adjustment.

G. A lomp embodying en exterior casing nnd en interior redentor definingsin nnol structed specs between them, e light-cni-ry ing' memberbridging' seid space extending through seid erasing end reflector andheving sliding` bearing' therein, e tongue md groove connection betweenseid easing end member, stop ineens eerried by seid member in seid spacefor engjz'tgement with re'- tlece'or end casing respectively to limitthe longitudiiml motion ol' seid member, end demping devices to holdseid lig'htcnrrying Ineens in selected positions of longitudinal v jtm/ent.

7. A lamp comprising, in combination, en ,Xt/rior @using end nn interiorrelleetor, n hteeerryinr; member extending' through 1e sznne und having;sliding' bearing' therein whereby to permit :nljnstment et the toons olthe light, e rongr'itudinel groove in seid member, :i clamping' deviceentering' seid groove and flnpted to guide the member in its sliding'movement end. susceptilfxle et screw udjustment :from the exterior olthe casing; to brace the member trein the well thereo'lE end hold it inselected. positions ot adjustment.

S. lump oomprisingr, in combination, en. exterior casing end en i teriorrel'lector, n, light-cztrrying member .onf-ling; through the sen' e :indheving' sli( ling;` bearing therein whereby to permit adjustment oli the`toons of the light, e longiuudinel groove in seid member, e clamping'novice lnivingg' e portion entering seid groove to guide the member inits sliding movement, seid chimp ing' devine inclu ine' member disposedwithin seid rinsing adjacent seid light-carrying member and e screwentering the seme end :rdjusteble from the exterior ot the casing' toapply clamping' pressure to seid. lighlcnrryinp member.

lamp embodying' :in exterior effisinze' and en interior relieetordelinine n. eprice be tween them end e, housing' extending' renna werdlyfrom seid zesing :forming e handle 'for the lamp, n light-eerrying;member extending through the reflector end housing' end having' sliding'bearing therein, end e pecllrinn' of yielding insulating meterle-ledjecent the junction ot seid housing' and the mein body 0i the casinghaving lirm :trictionel engagement with seid member and forming epartition between the interior of seid housing and seid space.

l0. A lump embodying en exterior casing end en interior reflectordefining space between them and e housino' extending refirwerdly fromseid casing forming e handle 'lor the lamp, e light-cnrrying member entending' throiigh the reflector sind housing and hem sliding; bearingtherein, electric Connections to seid member disposed in said spece, enda jmcking ol: yielding insulating materiel adjacent the junction olfseid housing and the malin body ot the casing; having lirm frietionelengagement with seid member end forming e partition noting;v to preventprojection ol said connections into Contact with the inner well et seidhousing.

il. A limp embodying e casing' :ind en interior reflector de'lining espace between them, the casing having' e hollow renrwurd extension, :1,-light-carrying` member extending' through the reflector end received inseid extension and :L pecking member fitting the extension and lering':in aperture reeeiyii'lg seid light-carrying' member n nd providing eilirictionnl bearing' therefor.

l2. A lamp emlfnnlyinn' e casing' :md en interior reflector deininn' espfioe between them, e, lightcerryinn' member extending between theseme, electrical condinzting devices in seid space connected to seidmember, en insulating' washer cerriefl by seid member edjncent e pointof coi'inection of seid conducting devices end adapted to limit movementot seid member by coming' in contact with adjacent parts of the lomp endthereby also preventing' grounding' oit seid conducting' devices on seidperte.

1,3. A lamp embedying;r e casingr end en interior reflector defining espace between them, seid reilertor having); un opening' to seid speee,:i member slidebly mountedv .in the opening' :ind bovine' e socket etits end to receive :in electric bulb, electric/nl connectinel de'if'iespassingthrough the casing :ind conneeted to seid `,ieml'ier in seidspace, :in insulating plete eer ied by seid member extending' forwardlyoil? the point ot' connection et said devices end adapted to makecontact with the reflector to limit sliding movement of the salme. V

lin testimony whereof l have signed my neme to this snenilieetion.

ELLSlVORTH n. H: l/VTHURNE.

